jan_nielsen Posted June 2, 2019 Share Posted June 2, 2019 Hi. What is wrong ? I saw the issue for the first time today. It does not happen to all photos. It can happen for single-frame, but also when shooting a sequence (Ch). When it's a sequence it can happen for any of the photos in the sequence. It can happen for stills and for video. It happens on both my 24-70/2.8 and 70-200/4. So I guess it's a problem on the body (D800) ? Is it a sensor-issue ? Is it a shutter-issue ? Is it an aperture-issue ? Thank you, Jan Link to comment Share on other sites More sharing options...
ShunCheung Posted June 2, 2019 Share Posted June 2, 2019 Shutter issue? What shutter speed did you use? Link to comment Share on other sites More sharing options...
jan_nielsen Posted June 3, 2019 Author Share Posted June 3, 2019 Photos were shot with different shutterspeeds and apertures. I.e. 250/8 200/7.1 1000/5 640/5. The level of darkness varies - also even though shutter and aperture is the same. Link to comment Share on other sites More sharing options...
jan_nielsen Posted June 3, 2019 Author Share Posted June 3, 2019 Here a little less darkness at right. Link to comment Share on other sites More sharing options...
mike_halliwell Posted June 3, 2019 Share Posted June 3, 2019 Well, it's entirely mechanical, rather than electronic. The doorway and navy ship shots are dark stripes, the image brightens again at the frame edge. The image of the boat mast has a slight diagonal/angled shading, darker at top for further out. Knackered shutter or something oddly loose in the mirror box. What i don't get is the video bit, there's no shutter at work, as such. Can you 'see' it in LV? Lock the mirror up and look into the mirror box. How are the shutter blades? Fire off a few frames and see what you can see. Link to comment Share on other sites More sharing options...
steve_gallimore1 Posted June 3, 2019 Share Posted June 3, 2019 Mirror not lifting completely or dropping back down a bit? Or something else mirror related, like a bit of light seal tape? 1 Link to comment Share on other sites More sharing options...
BeBu Lamar Posted June 3, 2019 Share Posted June 3, 2019 Mirror not lifting completely or dropping back down a bit? Or something else mirror related, like a bit of light seal tape? Mirror problem can't happen in video. The OP said he had problem with video too. Link to comment Share on other sites More sharing options...
mike_halliwell Posted June 3, 2019 Share Posted June 3, 2019 Mirror problem can't happen in video. The OP said he had problem with video too. There's no mechanical shutter either is there in video??? Link to comment Share on other sites More sharing options...
BeBu Lamar Posted June 3, 2019 Share Posted June 3, 2019 There's no mechanical shutter either is there in video??? No and that's why I couldn't guess as to why. 1 Link to comment Share on other sites More sharing options...
mike_halliwell Posted June 3, 2019 Share Posted June 3, 2019 So if it is visible in video, it's a physical obstruction....but... I can't quite see how it can be a dark band or stripe. There should be noting visible in the mirror box. Link to comment Share on other sites More sharing options...
CvhKaar Posted June 3, 2019 Share Posted June 3, 2019 Mirror problem can't happen in video. The OP said he had problem with video too. Mirror trouble can happen in video if the mirror is not totally lifted, Also if one of the dampening rubbers in the mirror box has come paartly looose i think.. Guess best thing is hand it over to a nikon service dept. and ask for a repair estimate, it will tell you what is wrong. Might take some time though.. Link to comment Share on other sites More sharing options...
ed_farmer Posted June 3, 2019 Share Posted June 3, 2019 Mirror problem can't happen in video. The OP said he had problem with video too. Of course it can. The mirror is not properly flipping up but is hanging up on something so that is interferes with the image. This is almost certainly what is happening. Link to comment Share on other sites More sharing options...
steve_gallimore1 Posted June 3, 2019 Share Posted June 3, 2019 Mirror problem can't happen in video. The OP said he had problem with video too. I may be wrong, not owning or ever having used a digital SLR, but as far as I can tell, in order to use live view or video, the mirror must be up and the shutter must be open. Essentially, as far as the mechanical parts of the camera are concerned, video and live view are a 'B' exposure. So if the mirror hasn't lifted properly, or is rebounding, then it will be hanging down into the light path, cutting light from the bottom of the image. It's worth having a look, as older cameras often used a bit of tape to cover the mirror hinge, which could eventually come unstuck, don't know if modern ones do though. The instant return mirror is by far the weakest part of the SLR design, lots of ways it can go wrong. Link to comment Share on other sites More sharing options...
mike_halliwell Posted June 3, 2019 Share Posted June 3, 2019 cutting light from the bottom of the image. Yup, very true, but in 2 of the cases it's a stripe, ie the image brightens again on the 'bottom' edge of the frame, and I have no idea how it can do that! Link to comment Share on other sites More sharing options...
ed_farmer Posted June 3, 2019 Share Posted June 3, 2019 Yup, very true, but in 2 of the cases it's a stripe, ie the image brightens again on the 'bottom' edge of the frame, and I have no idea how it can do that! Are we looking at different pictures? Link to comment Share on other sites More sharing options...
mike_halliwell Posted June 3, 2019 Share Posted June 3, 2019 Are we looking at different pictures? Ed, look at the bottom of the frame on the doorway shot and you can see it gets brighter again, particularly visible on the left hand side. 1 Link to comment Share on other sites More sharing options...
Andrew Garrard Posted June 3, 2019 Share Posted June 3, 2019 Are we looking at different pictures? I'm not sure, but I'm with Mike. :-) Both landscape shots have content in the corners "under" the dark area. I like the floppy mirror theory. Link to comment Share on other sites More sharing options...
mike_halliwell Posted June 3, 2019 Share Posted June 3, 2019 here you go.... just brightened them a bit. Link to comment Share on other sites More sharing options...
ed_farmer Posted June 3, 2019 Share Posted June 3, 2019 Ed, look at the bottom of the frame on the doorway shot and you can see it gets brighter again, particularly visible on the left hand side. Your right . . . But, only in the corners which eliminates the shutter, which extends beyond the edge of the frame and increases the likelihood of it being a mirror problem. The mirror is smaller and as it moves up some light will be seen around the corners of the mirror. Link to comment Share on other sites More sharing options...
mike_halliwell Posted June 3, 2019 Share Posted June 3, 2019 and the second.. Link to comment Share on other sites More sharing options...
mike_halliwell Posted June 3, 2019 Share Posted June 3, 2019 there's a definite shape to it here... Anyone know what it is? Link to comment Share on other sites More sharing options...
ed_farmer Posted June 3, 2019 Share Posted June 3, 2019 Yes . . . The mirror . . . Link to comment Share on other sites More sharing options...
mike_halliwell Posted June 3, 2019 Share Posted June 3, 2019 Bit more... So 'soft' mirror return spring? Link to comment Share on other sites More sharing options...
2Oceans Posted June 3, 2019 Share Posted June 3, 2019 Jan, you might lock the mirror up for sensor cleaning or do a long exposure with the lens off. If you look straight at the camera with either of these two methods you should see if the mirror is completely out of the way. You could compare it to another camera. Good luck. Link to comment Share on other sites More sharing options...
BeBu Lamar Posted June 3, 2019 Share Posted June 3, 2019 Bit more...[ATTACH=full]1297961[/ATTACH] So 'soft' mirror return spring? Now it does look like the secondary mirror. Link to comment Share on other sites More sharing options...
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